Fountain pen



S. M. SAGER FOUNTAIN PEN March 24, 1936.

Filed March 12, 1934 3mm M 6219er ,Solomon Patented Mar. 24, 1936 UNITEDSTATES PATENT OFFICE 4 claims. (c1. 12o- 46) It is an object of thisinvention to -provide a fountain pen of the bellows and plunger typewherein the bellows is operable by' a plunger and upon release of theplunger causes entrance of a supplyof ink into the container or Vbarreland simultaneously acts as a spring means for returning the plunger tonormal position.

Still another object of the invention is to provide an improved type offountain pen having a plunger operated bellows engaged in a unit securedon one end of the fountain pen barrel and adapted to be so constructedthat the body of the fountain pen, including the barrel and end caps,may be constructed of a plurality of diierent oval or flattened shapes,rather than the conventional cylindrical or round fountain pen shapes.

Another object of the invention is to provide a fountain pen havingsecured on one end of the 'barrel thereof a lling and ink supply unit.

Other and further important objects of 'this invention will be apparentfrom the disclosures in the specification and the accompanying drawing.

This invention (in preferred forms) is illustrated in the drawing andhereinafter more fully described.

On the drawing:

Figure 1 is an elevational view of the fountain pen with both end capsremoved and showing a predetermined quantity of ink in the barrel.

Figure 2 is an enlarged longitudinal detailed section through the upperend of a fountain pen, illustrating a ller mechanism in the form of abellows.

Figure 3 is a similar section illustrating another modified form of abellows operable by means of a telescoping type of plunger mechanism.

As shown in the drawing:

A fountain pen, indicated generally by the numerals I0, comprises apassaged body or casing I I, of separable parts, which carries a pen nibI4 at its lower end and a filling device at its upper or shank end, andis adapted to provide a reservoir or barrel I2 for a quantity of writingink I3.

The portion of the casing which'provides the ink reservoir I2 is oftransparent material, and is suitably graduated and marked so that onemay readily note to what extent the ink I3 occupies the normal inkspace.

The pen nib I4 is operably connected with the reservoir I2 by inkfeeding means (not shown), and the reservoir is provided with suitableinlet means, such as an inlet tube I5 connected to the ink feeding meansat its lower end and terminating at its upper end at a point just belowthe shank portion I6'of the casing. A ller mechanism is disposed in theshank portion I6 of the casing II to suck ink through the inlet of thereservoir by the way of the tube I5, or its equivalent, and the fillermechanism comprises a bulb I1 formed of ilexible material, such asrubber, and a plunger I8 suitably guided by guiding means in the casingfor longitudinal movement l in the casing to produce movement of thebulb I1. The bulb I1 is closed at its upper end, and the interior of thebulb is in communication with the inlet I5 and the reservoir I2 throughan opening I9 in a base flange 20 of the bulb. l5 The base ange 20 is ofsubstantial thickness and of a diameter suftlcient to afford a tightfricf l tional t with the inner face of the wall of the casing Il, andit seats tightly on an abutment 2| formed in the wall of the casing. 20

As is indicated by the numerals 22 and 23 of Figurel 2, the wall of thebulb I'l is of graduated thickness, or may be considered as formed ofintegrally connected walls of different thicknesses. It will be obviousthat as the head of the bulb I1 is moved downwardly by the applicationof a force to the plunger I8 to produce downward movement of theplunger, the converging walls 23 will pivot about the thicker wall 22and move' downwardly, and that a portion thereof will seat on the innerface of the diverging wall 22 which, in effect, provides an elastic orspringy conical seat for the seated portion. It will be equally obviousthat when the downward force is withdrawn from the plunger theself-restoring action of the walls of the bellows will return the bulbto its normal expanded condition, and not only push the plungeroutwardly'but also suck a supply of ink into the ink space of the barrelthrough the intake tube I5. 40

In Figure 3 the bulb I1 is shown as formed of a plurality of integrallyconnected converging and diverging walls of different thicknesses sothat the structure presents a plurality of infolding walls and aplurality of elastic conical seats.

The walls of the bulb I 1 may be reenforced by a wirev coil or spring 24embedded therein.

The head of the bulb is provided with an integrally connected andcentrally disposed stem or linger 25 which is secured within the plunger8l, 50 to form a convenient means for the application of the force ofthe descending plunger to the elastic head of the bulb.

I claim as my invention.:

1. A fountain pen comprising an elongated barrel having means thereindefining an annular seat. a filler unit in said barrel having a baseilange seated on said seat, said ller unit coinprislng an elongated andintegral bulbous structure of resilient rubber, or the like, formed toprovide spaced opposed walls of a certain thickness and other spacedopposed walls of a less thickness whereby said walls of less thicknessare adapted to be resiliently seated on and between said walls ofgreater thickness when pressure is applied longitudinally to the bulb.

2. In a. fountain pen,`a illler unit'comprising an elongated integraland bulbous structure of resilient rubber. or the like, provided with abase flange, and formed to provide spaced opposed walls of a certainthickness and other spaced opposed walls of a less thickness wherebysaid walls of less thickness are adapted to be resiliently seated on andbetween said walls of greater thickness when pressure is appliedlongitudinally to the bulb.

3. In a fountain pen, a ller unit comprising an elongated integral andbulbous structure of resilient rubber. or the like, provided with a baseiiange, and formed to provide spaced opposed walls of a certainthickness and other spaced opposed walls of a greater thickness shapedto define an approximately conical and resilient seat for said walls ofless thickness when pressure is applied longitudinally to the bulb.

4. In a fountain pen, a iiller unit comprising an elongated integral andbulbous structure of resilient rubber, or the like, and formed to dennespaced rearwardly diverging walls and other spaced rearwardly convergingwalls whereby said diverging walls are adapted to provide a conical seatfor said converging walls when said converging walls are seated on andbetween said diverging walls upon the application of pressurelongitudinally tok said bulb.

SOLOMON M. SAGER.

